Adolescents are the future of the human society. To achieve positive progression and development of the society at large, all round development and mental stability of adults during their adolescence is a quintessential prerequisite and should thus receive utmost priority from the adults (parents, teachers and peers) who may be directly or indirectly related to adolescents parents, educators and members of our society unequivocally acknowledge that adolescence is a critical period for physical, emotional and mental development that will ultimately provide adult life contentment and a sense of achievement. Researchers across the world have reiterated that 13-19 years of age are the most fascinating years of growth when children experience not only physical transformation but also undergo hormonal changes. These changes lead adolescents to adopt both positive and negative outlook / decision making when they come at the crossroads in life. Parents, educators and psychologists around the world have been found to show keen interest in identifying various factors which might positively affect Adolescents' 'Academic Achievement' and 'Behaviour Adjustment'. This research aims to determine how and to what extent, Parental and Teacher's Involvement influences the achievements and 'Behaviour Adjustment' of teenagers. Comprehensive knowledge of this subject may not only help to recommend 'Parenting Practices' but also 'Policies, Practices and Activities of Educational Institutions', with both working in tandem towards the common goal. It may also facilitate teachers in devising a roadmap for their involvement, while aiming for improved Academic results and 'Behaviour Adjustment' in teenagers. The research may help in designing and developing a concrete plan for Parental and Teacher's Involvement, including constructs that eventually may get identified which have most positive and powerful impact in adolescents